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Color toner prepared by emulsion polymerization-coagulation one-step method and method thereof

A color toner and emulsion technology, which is applied in the fields of instruments, developers, optics, etc., can solve the problems of long toner preparation time, complex process, high energy consumption, etc., and achieve the goals of shortening the preparation time, increasing the coagulation rate, and high conversion rate Effect

Active Publication Date: 2019-01-04
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method for preparing color toner by emulsion polymerization-coacervation method, which solves the problems of long preparation time, high energy consumption and complex process of traditional polymerization-coagulation method

Method used

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  • Color toner prepared by emulsion polymerization-coagulation one-step method and method thereof
  • Color toner prepared by emulsion polymerization-coagulation one-step method and method thereof
  • Color toner prepared by emulsion polymerization-coagulation one-step method and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Step 1: Preparation of organic pigment, wax, and charge regulator dispersion: 7 parts of organic pigment blue RB15:3, 20 parts of oxidized polyethylene wax emulsion, 1 part of charge regulator, 8 parts of TX-100, 1.5 parts of SDS Put it into the container, add 650 parts of deionized water, ultrasonically disperse for 10 minutes, then transfer to a ball mill, and ball mill for 8 hours at a speed of 580r / min to obtain a dispersion with uniform particle size, good dispersibility, and no agglomeration. The TEM image of the morphology is shown in figure 1 shown;

[0054] Step 2: Preparation of resin-coated pigment, wax and charge agent composite latex particles: transfer the dispersion prepared in step (1) to the reactor, add 75 parts of styrene and 20 parts of butyl acrylate into the container, and ultrasonically Mix evenly, and then add dropwise to the dispersion in the reactor within 40 minutes under stirring at a rotation speed of 450 rpm. Dissolve 3 parts of water-sol...

Embodiment 2

[0062] Step 1: Preparation of organic pigment, wax, and charge regulator dispersion: Add 5 parts of organic pigment yellow RY17, 15 parts of oxidized polyethylene wax emulsion, 0.5 parts of charge regulator, 5 parts of TX-100, and 1 part of SDS into In the container, add 600 parts of deionized water, ultrasonically disperse for 8 minutes, then transfer to a ball mill, and ball mill for 7 hours at a speed of 580 rpm to obtain a dispersion with uniform particle size, good dispersibility, and no agglomeration;

[0063] Step 2: Preparation of resin-coated pigment, wax and charge regulator composite latex particles: transfer the dispersion prepared in step (1) to the reactor; add 65 parts of styrene and 15 parts of butyl acrylate into the container , ultrasonically mixed evenly, and then added dropwise to the dispersion in the reactor within 35 minutes under stirring at a rotational speed of 400 rpm. Dissolve 2 parts of water-soluble initiator KPS in 90 parts of deionized water, af...

Embodiment 3

[0068] Step 1: Preparation of organic pigment, wax, and charge regulator dispersion: 3 parts of organic pigment red PR48:2, 10 parts of oxidized polyethylene wax emulsion, 0.2 part of charge regulator, 2 parts of TX-100, 0.4 part of SDS Add to the container, add 500 parts of deionized water, ultrasonically disperse for 5 minutes, then transfer to a ball mill, and ball mill at 580rpm for 4 hours to obtain a dispersion with uniform particle size, good dispersibility, and no agglomeration;

[0069] Step 2: Preparation of resin-coated pigment, wax and charge regulator composite latex particles: transfer the dispersion prepared in step (1) to the reactor; add 55 parts of styrene and 10 parts of butyl acrylate into the container, Ultrasonic mixing is uniform, and then it is added dropwise to the dispersion in the reactor within 30 minutes under stirring at a rotational speed of 350 rpm. Dissolve 1.5 parts of water-soluble initiator KPS in 80 parts of deionized water, and slowly drop...

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Abstract

The invention discloses a color toner prepared by an emulsion polymerization-coagulation one-step method and a method thereof. Multiple groups of latex particles with styrene-acrylic resin coated withpigment, wax and a charge control agent are prepared by in-situ emulsion polymerization. During the deceleration of polymerization, coagulant was added to make the particles coagulate with each other, and then the final color toner is obtained by steps of external addition and the like. The invention has the following advantages: 1) adopting a polymerization-coagulation method one-step method, coagulant is added in the deceleration period of polymerization, and the growth and curing of flocs and the polymerization of monomers in latex particles are carried out simultaneously, so as to simplify the production process and improve the production efficiency; 2) that tedious proces of cooling, dilute and re-heating the emulsion by the traditional polymerization method is avoided, and the preparation time is greatly shortened; 3) The coagulation of latex particles at high temperature improves the coagulation rate of latex particles, which is advantageous to obtain the composite particles with high conversion rate, and the rapid cooling after coagulation is advantageous to obtain the quasi-toner particles with good sphericity and narrow particle size distribution.

Description

technical field [0001] The invention relates to a method for preparing color toner, in particular to a color toner prepared by one-step emulsion polymerization-coagulation method and the method thereof. Background technique [0002] Color toner is a micron-level high-tech composite product with polymer resin and organic pigment as the main body, wax, charge regulator and silicon dioxide as additives. It is the main consumable for color laser printers and copiers. With the development of information technology and the popularization of office automation, the market has higher and higher requirements for the quality and quality of color toner, and its production and preparation have also received more and more attention. At present, the production methods of color toner mainly include melt pulverization and chemical polymerization. The melt pulverization method is to melt and knead each component of the toner at high temperature, and then use processes such as extrusion, cool...

Claims

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Application Information

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IPC IPC(8): G03G9/08
CPCG03G9/08G03G9/0804
Inventor 叶明泉张奎韩爱军陈昕丁成杨计玲张羽
Owner NANJING UNIV OF SCI & TECH
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